

#include<stdio.h>
int main()
{
	int price=0;
	int bill=0;
	printf("pleas input price:");
	scanf("%d",&price);
	printf("pleas input your pay:"); 
	scanf("%d",&bill);
	if(bill>=price){
		printf("you shall get some money back: %d\n", bill - price);

	}else{
		printf("Sorry, your pay is not enough\n");
	}
	return 0;
}




 
